Drive chain



May 4, 1948. J. BOURDEAUX DRIVE CHAIN Filed Dec. 1, 1945 Search Room2.SheetsSheet 1 mvav ron JOHN BOD'AUX ATTORNE 36' Il)" UUI May 4, 1948-J. BOURDEAUX DRIVE CHAIN Filed Dec. 1, 1945 2 SheetsSheet 2 /NYEN TORaomv JOURNAUX AT TORNY Patented May4, 1948 Search Room DRIVE GRAIN JohnBourdeaux, Vancouver, British Columbia,

- Canada Application December 1, 1945, Serlal No. 632,224

6 Claims. (01. 74-250) My invention relates to improvements in drivechains, which are adapted for use as conveyor chains, power transmittingchains and chain cutting devices such as falling and bucking saws, orany type of wood or metai cutting endless chain saws.

The objects of the invention are to provide a saw in which the strainbearing links ail lie in a single plane and in which the rolling contactbetween one link and another shall be in direct alignment with the pullof the chain and along the axis of the load. A further object is toprovide a large bearing ares. as between each pair of links and toprovide a chain having a single line of connecting links and chainrollers on both sides of the single row of links, as wiH be more fullydescribed in the following stiecification and shown in the accompanyingdrawings, in which- Fig. 1 is a side view 01 the chain in its simplestform, passing over a chain sprocket.

Fig. 2 is a. transverse sectiona1 view taken on the line 2-2 of Figure1.

Fig. 3 is a side view of one of the washers.

Fig. 4 is a side view of a chain rafler.

Fig. 5 is a side view of a modification, adapted to run on V-beltpulleys.

Fig. 6 is a side view showing links only 01' the chain.

Fig. 7 is a transverse sectional view taken on the line 1-! of Figure 5.

Fig. 8 is a longitudinal sectiona1 view taken on the line 88 01 Figure5.

In the drawings like characters of reference indicate correspondingparts in each figure.

The numerai I, see Figures 1 and 2, indicates a sprocket formed with adisk 2 having a peripheral groove 3 defined between sides 4, both ofwhich are provided with sprocket teeth 6. These teeth are arranged inpairs, one tooth of each pair being on opposite sides of the disk 2. Thesprocket I is obviously mounted upon a shaft 1 to which it is eithersecured or journailed as the circumstances of the device demand.

A chain 9 is formed of links Il! of sheet materia1, each of which isidentica] in form and consists of 9. centre portion Il having an eyedhead l2 at one end and an encircling hook l3 at its opposite end. Thehead I2 of one link is adapted to be contained in rocking engagementwith the bight of an adjacent encircling hook of the adjoining link. Thebight of each link is circumerentially larger than the eyed head of itsmating link so as to permit said eyed head to rock sufllciently withinthe encircling hook of the next link as the links assume their angularposition on approaching the sprocket. An elongated washer l5 ispreferably applied ,to opposite sides of each pair of links Il). Thesewashers are apertured as at l6 adjacent each end and each aperture isadapted to register with the eye of adjacent heads l2. The washers arewider than th heads l2 so as to embrace the head and its connecting hookto prevent disailgnment of the links. A roller I8 is fitted on each sideof every link of the chain with 9. pin l9 which passes through therollers, a pair of washers [5 and the eyed head of each link, therollers obviously serving to engage the sprocket between the teeth 6 andthe washers serving to prevent side wear between rollers and link parts.

The chain as thus far described is adapted for use as a drive chain asbetween one sprocket and another. If the chain were intended for use asa conveyor chain appropriate cross members would be attached to theouter edge of some of the links Il).

In the modification shown in Figures 5 to 8, the chain is intended to beused as a belt and fitted to a pulley 2| having a Vgroove 22. The chainhere indicated by the numeral 24 is made up of links 25 which aresimilar in form with the links J hereinbeiore described, except that thelinks 25 are provided with a central apertur 25 through each of which abolt 21, see Figure 8, is passed. An elongated washer 29 is fitted onopposite sides of each alternate link and is provided with a centralaperture 30 through which the bolt 21 extends. Applied on the outside ofeach washer 28 is a block 32 of fibre or other suitable material whichis tapered on its outer sides t0 conform to the angle of the pulley rimand is rounded off at its ends as at 33. The blocks are aperturedintermediate their length to support the bolt 21 and its nut 35, whichlatter is preferably embedded in the block. Further apertures 36 areprovided in the blocks 32 to receive pivot pins 31 which extend throughthe end of adjacent chain links. Each block 32 is prei erablycgate dmt39 vn firgal eg qr other relatively soit materiai to prov a g ppingsurface for engaging the V- groove 22 of the pulley 2 l.

In this modification, the blacks 32 and their covering form the drivingelement between the links 25 and the driving wheel or pulley and as eachblock is substantiaily one and a thlrd times the link length betweenplus 31, adequate grlp is provided to impart a. drive of any desiredload.

What I claim as my invention is:

1. A chain adapted to be driven by a drive wheel, said chain comprisinga. plurality of links each formed 01 sheet material andhaving a hook atone end and a. head at the opposite end adapted to be fulcrumed Withinthe hook of an adjoining link, means embracing the opposite sides of thecomplementary hook and head of each link and driving elements for thechain adapted to secure the side embracing members in position upon thelinks.

2. A chain adapted to be driven by a drive wheel, said chain comprisinga plurality oi links each formed of sheet material and having a hook atone end and an eyed head at the opposite end adapted to be fulcrumedwithin the hook of an adjoining link, a pair 01 members embracing thesides of the connected link members, a pin extending through the membersand the eye of the head and driving elements for the chain adapted tosecure the side embracingznembeis in position.

3. A chain comprising a plurality of links each formed of sheet materialand haVing a hook at one end and a head at the other adapted to zbefulcrumed in the hook of an adjoining link, a pin extending through eachhead and a roller upon each end of the pin.

4. A chain comprising a piurality of links each formed of sheet materialand having a hook at one end and a head at the other adapted to befulcrumed in the hook of an adjoining link, a pin extending through eachhead anda roller upon each end of the pin. said roller being of greaterdiameter than the head of the link.

5. A chain comprising a. plurality of links each formed of sheetmaterial and having a hook at one end and a head at the opposite end,the head being adapted to be fulcrumed in the hook of an adjoining link,a washer mounted on opposite sides of some of the links, a pin extendingthrough each pair of washers and through the complementary heads andhooks of adjoining links and means secured to the washers forming adriving member for the chain.

6. A chain comprising a plurality of links each formed of sheet materialand having a hook at one end and a head at the opposite end, the headbeing adapted to be fulcrumed in the hook of an adjoining link, a washermounted on opposite sides of some of the links, a pi n extnding thr ongheach pair of washers and through the complementary heads and hooks ofadjoining links and means secured to the washers forming a drivingmember for the chain, said driving member means being secured to thewashers by a bolt extending through said washers and a link of thechain.

JOHN BOURDEAUX.

REFEREN CES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,151,587 Hess Aug. 31, 19151,842,521 Goble Jan. 26, 1932

